Astronomy facts

Explore 1 curated astronomy facts on ScienceCards. Discover surprising, well-sourced science one card at a time.

• Neptune's winds travel at 2000 km/h or 1,243 miles per hour. — Neptune's winds travel at 2000 km/h or 1,243 miles per hour. That's about 1.6 times the speed of sound, making them supersonic.